Notice to Members 2017-27

Date: May 24, 2017
Re: Maintenance to UAT
Effective Date: May 25, 2017

OneChicago, LLC (“OneChicago”) is issuing this Notice to Members (“NTM”) 2017-27 to inform market participants that OneChicago will be performing updates and routine maintenance on our user acceptance testing (“UAT”) environment on Thursday, May 25, 2017 from 1600 CT to 1800 CT. UAT services at this environment will be temporarily unavailable during this time and will resume at 1800 CT.


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If you have any questions, please contact OneChicago Operations at (312) 883-4311 or